Security Advisory

CVE-2025-66019

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2025-11-25 23:38:12

Last updated 2026-01-20 18:33:02

Assigner GitHub_M

State PUBLISHED

Description

pypdf is a free and open-source pure-python PDF library. Prior to version 6.4.0, an attacker who uses this vulnerability can craft a PDF which leads to a memory usage of up to 1 GB per stream. This requires parsing the content stream of a page using the LZWDecode filter. This issue has been patched in version 6.4.0.

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